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Turkish Journal of Chemistry, Vol.43, No.3, 741-749, 2019
Effect of Fe substitution on the partial oxidation of methane to syngas over La0.7Sr0.3Co1-yFeyO3-delta perovskites
In this research, a series of La0.7Sr0.3Co1-yFeyO3-delta (y = 0.0-0.4) was successfully synthesized by a solidstate reaction method and syngas production studies were performed using gas chromatography. Thermogravimetric analysis characterized the concentration of Fe3+, which gave a low H-2/CO ratio over La0.7Sr0.3Co1-yFeyO3-delta without the presence of molecular oxygen. All samples possessed a purely rhombohedral structure. The incorporation of more Fe increased the lattice parameter and changed XRD peaks of the La1-xSrxCo0.8Fe0.2O3 from sharp and single to double. Among the catalyst powders tested for syngas production activity, La0.7Sr0.3Co0.6FeyO3-delta (y = 0.4) had the low molar ratio of H-2/CO with high content of Fe3+ at 850 degrees C.